Abstract：Considering the effect of the spacing of the inner grain piles of low temperature granaries on the cooling time of grain in South China, the concept of “spacing ratio” was proposed to describe the grain stacking method to ensure the safety of grain storage. Taking a high-rise low-temperature warehouse in South China as an example, based on the local maximum grain temperature in the grain storage, the appropriate simulation method was obtained by experiment and numerical simulation method, and the correspondence between the spacing ratio and the cooling time was obtained. Testing results indicated that there was a minimum value in the domain of the spacing ratio cooling time curve ie an optimal spcaing ratio. The optimum spacing ratio in the experimental range was between 0.70 and 0.80. The results showed that, compared with the worst case of stacking, 40% of the cooling time could be saved under the optimal spacing of the grain depot. This study provided reference for grain efficient storage in South China.
2020, Vol. 33 
